EXPERIMENTAL STUDY ON ROTOR BALANCING AND STRUCTURAL REPAIR METHOD TO OVERCOME UNBALANCE AND STRUCUTRAL LOOSENESS IN CENTER HUNG MACHINES

Andi Kurniawan(1*)


(1) PLN
(*) Corresponding Author

Abstract


Unbalance and structural looseness are problems in industrial machines that can amplify the machine's vibration level if they occur simultaneously. Experimental study was done by comparing rotor balancing and machine’s structural repair methods in dealing with unbalance and structural looseness problems. The investigated equipment in this study consists of rotor and disk which represent center hung machines in industries such as fans, blowers, pumps and others. A comparison was made between the rotor balancing and structural repairs under the same initial problem conditions and vibration levels. The result of this study indicate that structural repair reduced machine vibration at higher level compared to rotor balancing. Even when the specimens were subjected to unbalance problems again, the increase in machine vibration level, which was previously improved by structural repairmen is not excessively high.


Keywords


Unbalance; Structural Looseness; Rotor Balancing; Structural Repair; Center Hung Machines

Full Text:

PDF

References


R. K. Mobley, An Introduction To Predictive Maintenance, 2nd ed., vol. 42, no. 6. Woburn, United States of America: Butterworth-Heinemann, 2002.

R. B. Randall, Vibration-Based Condition Monitoring. 2011.

V. A. B. A. K. Kv, “Vibration Analysis: A Literature Review,” IOSR J. Electron. Commun. Eng. Ver. II, vol. 10, no. 5, pp. 2278–2834, 2015, doi: 10.9790/2834-10523539.

“Everything You Need to Know About Rotational Unbalance,” Puftechnick.com, 2022. https://blog.pruftechnik.com/rotational-unbalance/ (accessed Jul. 27, 2023).

Advance Vibration Analysis. Knoxville, USA: Computational Systems Incorporated, 2002.

“Mechanical Looseness,” Perpetual Industries, 2023. https://xyobalancer.com/mechanical-looseness/#:~:text=Structural Looseness This form of mechanical looseness usually,vibration in the axis with the lesser stiffness. (accessed Jul. 25, 2023).

M. A. Saleem, “Detection of Unbalance in Rotating Machines Using Shaft Deflection Measurement during Its Operation,” IOSR J. Mech. Civ. Eng., vol. 3, no. 3, pp. 08–20, 2012, doi: 10.9790/1684-0330820.

S. Mogal and D. Lalwani, “Experimental investigation of unbalance and misalignment in rotor bearing system using order analysis,” J. Meas. Eng., vol. 3, no. 4, pp. 114–122, 2015.

B. K. Kumar, G. Diwakar, and M. R. S. Satynarayana, “Determination of Unbalance in Rotating Machine Using Vibration Signature Analysis,” Int. J. Mod. Eng. Res., vol. 2, no. 5, pp. 33415–33421, 2012.

A. Kurniawan, “Pengaruh Looseness Terhadap Vibrasi Peralatan Yang Mengalami Unbalance Dan Misalignment,” vol. 10, no. 1, pp. 138–145, 2021.

A. Muszynska and P. Goldman, “Chaotic responses of unbalanced rotor/bearing/stator systems with looseness or rubs,” Chaos, Solitons and Fractals, vol. 5, no. 9, pp. 1683–1704, 1995, doi: 10.1016/0960-0779(94)00171-L.

ISO, “ISO 1940-1 - Mechanical vibration — Balance quality requirements for rotors in a constant (rigid) state,” vol. 2003, 2003.

J. E. Berry and G. Ford, Field Dynamic Balancing Using Portable Instruments. 2001.

S. Gencoglu, I. Bogrekci, and P. Demircioglu, “Case study of single plane balancing with four test run method,” IFAC-PapersOnLine, vol. 54, no. 13, pp. 40–45, 2021, doi: 10.1016/j.ifacol.2021.10.415.

W. Barringer, “How to Use Vibration Analysis to Identify Equipment Problems.” https://www.reliableplant.com/Read/31055/how-to-use-vibration-analysis-to-identify-equipment-problems (accessed Sep. 05, 2023).

M. L. Chandravanshi and A. K. Mukhopadhyay, “Modal Analysis of Structural Vibration,” no. November, 2013, doi: 10.1115/IMECE2013-62533.

S. M. Price, “A comparison of Operating Deflection Shape and Motion Amplification Video Techniques for Vibration Analysis,” Turbomach. Pump Symp., 2019.

C. Scheffer and P. Girdhar, Practical Machinery Vibration Analysis & Predictive Maintenance, no. 1. Oxford: Newnes, 2004.

J. E. Berry, Concentrated Vibration Signature Analysis and Related Condition Monitoring Techniques. Charlotte: Technical Associates of Charlotte, P.C., 1997.

P. Vinh Dang, L. H. Toan Do, N. Thanh Vo, T. Nghi Ngo, and H. Nam Le, “Identification of Unbalance in Rotating Machinery Using Vibration Analyse Solution,” IOP Conf. Ser. Mater. Sci. Eng., vol. 841, no. 1, 2020, doi: 10.1088/1757-899X/841/1/012011.

D. Whittle, “Phase Analysis: The Missing Weapon in The Fight Against Machine Downtime (Part II),” 2017. https://www.maintenanceandengineering.com/2017/03/01/phase-analysis-the-missing-weapon-in-the-fight-against-machine-downtime-part-ii/


Article Metrics

Abstract view : 96 times
PDF - 22 times

DOI: https://doi.org/10.26714/traksi.24.1.2024.46-60

Refbacks

  • There are currently no refbacks.


Copyright (c) 2024 TRAKSI

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.


TRAKSI : Majalah Ilmiah Teknik Mesin

ISSN : 1693-3451 (Pinted) e-ISSN : 2579-9738 (Online)

Published by: LP2M Unimus bekerjasama dengan APTI (Asosiasi Profesi Teknik Indonesia)  

 
ADDRESS

Jl. Kasipah No. 12 Semarang

E-mail: [email protected] Call: 0248445768


Sponsors

Asosiasi Profesi Teknik Indonesia (APTI)

Website: www.apti.or.id